i know our cars are 12 volt systems.what i need to know is i am cleaning a set of explorer injectors and i want to use an injector harness and a moment switch to make the injector open. how much voltage do i need to do this? thanks- slo

i am using (going to use) an explorer intake and tb and i heard on this site they perform well. they also have 4 holes to despense fuel insted of one.got a set for $32.00 and i'm i the process of putting new filters,rubber o-rings, and caps.